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Classic Currents

(1) Tested Ken Rad 7X7 Tube Code 748 Loktal Tube Diode Triode Vacuum Tube

(1) Tested Ken Rad 7X7 Tube Code 748 Loktal Tube Diode Triode Vacuum Tube

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(1) Tested Ken Rad 7X7 Tube.
Date Code 748.
The 188 EIA code indicates that this tube was made by GE for Ken Rad.

The wording is faded and worn but still legible.

Tested on a calibrated Hickok TV-10 military tube tester and exhibiting no shorts or leaks with the following results:

Gm Test = 1250 micromhos
Minimum pass/good = 630
Each diode section tests at 1175-1200 where 800-800 is minimum pass/good.

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